The singer-turned-fashion mogul shared an epic smooch with her longtime companion in this black-and-white Instagram shot Simpson posted to Instagram late Monday night.

"Goodnight kiss. I love this man," Simpson, 33, captioned the intimate photo that shows the lip-locked pair lying down while Johnson, 34, displays some sexy scruff.

Although their romance is evident, there's still no word on when the pair will tie the knot. The two got engaged in November 2010 and have since welcomed two children – daughter Maxwell Drew, 21 months, and son Ace Knute, 7 months.

Despite their lengthy engagement, Simpson makes no secret of her attraction to her former NFL player beau.

"I have to admit, it doesn't hurt that Eric is one of the hottest men I've ever seen and he looks amazing naked!" she recently told Redbook when asked about the secret to a long-lasting relationship.